Grammar_verb

实义动词：具备完整的词汇意义和能单独充当句子的谓语
英语中除了助动词和情态动词以外，其他的动词均为实义动词

助动词：不具备词汇意义和不能单独充当句子的谓语，它必须和实义动词连用，以帮助构成各种时态、语态、语气、否定和疑问等
英语中有三个助动词：be, do, have
be: am, is, are, was, were, been, doing
do: does, did
have: has, had, having
ps: 三个助动词也可以作实义动词

情态动词：有其自身的词汇意义，用来表示可能、建议、愿望、必要、允许、能力、怀疑等，以表示说话者对某种行为或状态的看法或态度，不能单独作句子的谓语，必须和实义动词一起构成复合谓语
英语中主要有十个情态动词：can/could, may/might, shall/should, will/would, must和had better

陈述句的否定构成有两种：谓语中含有be动词或情态动词的，以及谓语是实义动词的
谓语中含有be动词或者情态动词的否定直接在be动词或情态动词的后面加否定词not即构成否定句
谓语是实义动词的否定要借助助动词do及其各种变形来完成
一般疑问句的构成：谓语中含有be动词或情态动词的，以及谓语是实义动词的

谓语动词中含有be动词或情态动词的提问：只需要将be动词或情态动词移到句首
He is a master. - Is he a master? - Yes, he is./No, he isn’t.
He can swim. - Can he swim? - Yes, he can./No, he can’t.

谓语动词是实义动词的提问：如句子是一般现在时态，要借助助动词do或does，将do或does放在句首，如果是一般过去时，则是将did放在句首，谓语动词变回动词原型
I like English. - Do you like English? - Yes, I do./No, I don’t.
He likes swim. - Does he like English? - Yes, he does./No, he doesn’t.
He liked English. - Did he like English? - Yes, he did./No, he didn’t.

特殊疑问句：是在一般疑问句的基础上变化而来的，句式为：“特殊疑问词+一般疑问句+？”
特殊疑问词：who, what, which, when, where, why, how…….
I saw him at the party last night.
Who did you see at the party last night?

不与名词连用的疑问词：who, what, when, where, how, why
要与名词连用的疑问词：which, whose
Which one do you want?
Whose car did you borrow last night.

how单独使用是对动作的方式进行提问
How do you go to work?
how还经常与形容词或副词连用
How old are you?
har quickly can you get here?
how often/how many times..?是对动作发生的频率提问